1057Description Use the filter-policy import command to configure IS-IS to filter incomingrouting information.Use the undo filter-policy import command to disable IS-IS from filteringincoming routing information.IS-IS does not filter incoming routing information by default.In some cases, only the routing information satisfying certain conditions can bereceived. You can reference filtering conditions using the filter-policy command.Related commands: filter-policy export (IS-IS view).Examples # Reference ACL 2000 to filter incoming routing information. system-view[Sysname] isis[Sysname-isis-1] filter-policy 2000 importflash-floodSyntax flash-flood [ flood-count flooding-count | max-timer-interval flooding-interval |[ level-1 | level-2 ] ] *undo flash-flood [ level-1 | level-2 ]View IS-IS viewParameters flood-count flooding-count: Specifies the maximum number of LSPs to be sent inthe fast-flooding process, ranging from 1 to 15. The default is 5.max-timer-interval flooding-interval: Specifies the delay interval (in milliseconds)between when it is enabled and when it begins, ranging from 10 to 50000. Thedefault is 10.level-1: Specifies to configure fast-flooding on level-1 only.level-2: Specifies to configure fast-flooding on level-2 only. If no level isconfigured, the fast-flooding will be available on both level-1 and level-2 bydefault.Description Use the flash-flood command to enable IS-IS LSP fast flooding and configurerelated parameters, including the maximum number of LSPs to be sent and thedelay time before flooding.Use the undo flash-flood command to disable fast-flooding.Fast flooding is disabled by default.Using this command can speed up LSP flooding that is triggered by topologychanges, so as to reduce LSDB convergence time.
